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Machine for Rolling Gun Barrels.

No. 50,869. Patented Nov. 7, 1865.

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UNITED STATES PATENT OFFICE.-

JOSEPII YATES, 0F MOTT HAVEN, NEIV YORK.

MACHINE FOR ROLLING GUN-BARRELS.

Specification forming part of Letters Patent No. 50,869, dated November7, 1865; autedated October-25, 1865.

To all whom it may concern:

Be it known that I, JOSEPH YATES, of Mott Haven,in the county ofVVestchester and State of New York, have invented a new and ImprovedMachine for Rolling or Drawing Out Gun-Barrels and other Metal Articlesin Taper Form; and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had to theaccompanying drawings, forming part of this specificatiomin which Figure1, Sheet No. 1, is a side elevation of my invention; Fig. 2, Sheet No.2, a vertical section of the same, taken in the hue w as, Fig. 1; Fig.3, a plan or top view of one of the rotary dies and a bed-plate; Fig. 4,a view of a gun-barrel rolled or drawn outby my invention.

Similar letters of reference indicate like parts.

This invention relatesto a new andimproved machine for rolling ordrawing out gun-barrels and other articles of metal which require to beof taper form.

The invention consists in the employment or use of rotary dies ofsegmcntform arranged in one or more pairs, and with gages and bedplates,to operate as hereinafter set forth.

A represents an upright framing, in which two horizontal shafts, B B,are placed, one directly over the other, each shaft having a toothedwheel, 0, keyed upon it, and said wheels gearing into each other, asshown clearly in Fig. 2. The wheel 0 on the lower shaft,

B, gears into a pinion, D, on a shaft, E, at one side of the framing A.The power which drives the machine is applied to this shaft. Thebearings a of the upper shaft,B, are fixed, but the bearings a of thelower shaft, B, are adjustable, and are regulated by screws F, both ofwhich are shown clearly in Fig. 2. The shafts B B project beyond thesides of the framing A, and on one or both ends of these shafts thereare keyed cylindrical heads G. In Fig. 2 heads G are shown at both endsof the shaft. These heads Gareofcast-iron,and they are cast'with asegment-proj ection, H, which extends around about one-quarter of thecircumference of the heads, and have each a groove, 1), madelongitudinally in their upper surfaces, to receive the tongues c of diesI, which are of segment form, and are secured to the projections H ofthe heads G by means of pins d, which pass through the tongues c andprojections H, as shown clearly in Fig.2. The faces of the dies I areprovided with two circumferential grooves, e 6, (shown in Figs. 2 and3.) These grooves, when designed for rolling gunbarrels, are of taperform longitudinally, corresponding to the taper designed to be given thebarrels. The groove 6 is of elliptical form in its transverse section,beingof greater width than depth; but the groove 0 is of semicircularform in its transverse section. (See Fi 2.) The heads G G of each pairare keyed on theirshafts B B in such a position relatively with eachother that the peripheries or faces of the dies I I will, as the shaftsB B are rotated, have their face sides work or pass opposite each other,as will be understood by referring to Fig. 1, the arrows indicating thedirection of the movement of the dies and shafts. The grooves e e ofeach pair of dies are in line with each other, as shown in Fig. 2.

J J represent gages attached one to each side of the machine. Thesegages may be constructed of a flat metal plate bent at one end, f, so asto form a right angle with the main portion g, the latter having oblongslots It made in them, through which screwsz' pass into the framing. Bythis means the gages may be adjusted as desired, the ends f forming thestops for the work, and, by the adjustment above specified, beingbrought nearer to or farther from the dies I I, as circumstances mayrequire, the gages being in line with the bite of the dies.

K K are bed-plates, attached horizontally to the framing A, one at eachside, and in line with the bite of the dies I. v

In rolling or drawing out gun-barrels the rods are cut into pieces ofthe requisite length, and then heated to a requisite degree and placedon the plates K K, a workman being at each side of the machine, one toeach pair of dies. The rods are first inserted in the grooves c of thedies I, and are at each revolution of the dies rolled or drawn out, commencing at the inserted end. Three revolutions of the dies are requisiteto complete the first operation, the grooves 0 simply tapering anddrawing out the rods to a form approximating to the one desired. Therods are then inserted into the grooves c, which complete the operationand give a finish to the barrels. The rods are shoved or fed forward bythe attendants after each bite of the dies on the rods, the dies havinga continuous rotary motion.

The shape of the grooves a e of the dies of course vary, according tothe shape of the article to be rolled or drawn out.

The dies I may be of chilled cast-iron, and, owing to the manner ofattaching them to the heads Gr G, they may be readily removed from andapplied to the machine, dies adapted for different work being used onthe same machine.

This machine possesses the advantage of being extremely simple, far moreso than those in which rollers are employed, besides possessing theadvantage of enabling different kinds JOSEPH YATES.

Witnesses:

J OHN L. BURNETT, GEORGE MELLER.

